Final gather contribution is lost behind glass objects

For the Final gather contribution behind glass containers, you will need to adjust the MAX Trace Depth
This option is similar to -trace_depth but applies only to finalgather rays.
The defaults are all 0, which prevents final gather rays from spawning sub-rays.
This means that indirect illumination computed by final gathering cannot pass through glass.

Note: This is not compatible with mental ray 3.1 and earlier, which used the trace depth (which defaults to 2 2 4) for final gathering.

Comments

[Steve]

Also, FG diffuse and Reflection values appear to cap each other.

Cheers,

Steve